Ключевые слова:
Designations, Vickers hardness measurement, Torque, Steels, Threaded components, Set screws, Hexagonal-head fasteners, Fasteners, Classification systems, Temperature, Conformity, Test specimens, Sampling methods, Decarburization, Mechanical properties of materials, Testing conditions, Threaded fasteners, Screws (bolts), Brinell hardness measurement, Rockwell hardness measurement, Height, Hardness testing, Strength of materials, Surface properties, Length, Alloy steels, Hardness